How did Congress ensure the U. S. had enough troops in World War I?

How did Congress ensure that the military had enough troops to fight the war? They created the selective service system. What federal agencies help to control American industries during the war? (WIB) war industries Board; they coordinated the production of war materials.

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a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.